I saw the rabies warning on the bats - shouldn't that
go for all the mammals since they can all be potential carriers (like
the squirrel that wasn't afraid of people or the unresponsive vole
- those are rabies symptoms) and any slow enough to be caught and
handled are likely ill in some way?

I did a web search on +"frequency of rabies" and +bats
and found the following from a Texas newspaper:

"Myth: Bats carry rabies.Fact: Like all mammals, bats can contract rabies, but
they are not asymptomatic carriers of the virus. When a bat gets rabies,
it usually dies. Also, the frequency of rabies in bats is
very low."Source: Bat Conservation International

Another web site claimed the chance of a bat having rabies
was less than that of a cow, but they didn't site a source.

I also found a bat conservation web site (batcrew.com)
with probably the most well worded safety warning of the sites I had found:

"Unfortunately one of the biggest fears contributing
to the misunderstanding of bats, is they all 'carry' rabies.
Like other mammals, bats do contract rabies. However, research generally
cites that only half of 1% of bats have rabies. That does not mean you
should handle them: they will bite because they are afraid of you."

"If you are bitten by any animal that could be rabid—or
if saliva gets into your eyes, nose, mouth, or a wound—wash the
affected area thoroughly with soap and water and get medical advice immediately.
"

Another Canadian site suggested that if bit by a bat or
other rodent, it should be killed with great
care taken not to crush the head, since cerebro-spinal fluid must be sampled for a postmortem
rabies test.

And I peeked through the Center for Disease Control website...

"When people think about bats, they often imagine things
that are not true. Bats are not blind. They are neither rodents nor birds.
They will not suck your blood -- and most do not have rabies. "

"Any mammal can get rabies. The most common wild reservoirs
of rabies are raccoons, skunks, bats, foxes, and coyotes. Domestic mammals
can also get rabies. Cats, cattle, and dogs are the most frequently reported
rabid domestic animals in the United States."

"Bats account for less than 10% of the approximately 7,000–9,500 cases of animal rabies reported in the United States
each year."

I also learned that while humans can be known to carry
rabies, there have only been 8 known cases of a human contracting rabies
from another human. All of them were recipients of cornea transplants
in third world nations and the donors had died of either confirmed rabies,
or had shown symptoms compatible with a diagnosis of rabies.